Improvement in spring motors



2 Sheets-Sheet 1.

E. SHIVER. Spring-Motor. No. 205,690. Patented July 2, I878.

:1 w MIN 1: gnmmm. WITNESSES: v D 'JNVENTOIR @e/ MMM 6M6; a @(3 W yyg gATTORNEY NFETERS, PHOTO-LITMOGRAPNER, WASHINGTON, D O.

2 Sheets-Sheet 2.

E. SHIVER.

Spring-Motor. No. 205,690. Patented July 2,1878.

WITNESSES: I IN VENTO]? A TTORNE Y N.FETERS, PHQTO-L\T-40GRA?MER,WASHINGTON. D C.

PATENT FFICE.

ELISHA SHIVER, OF PITTSBURG, PENNSYLVANIA.

IMPROVEMENT IN SPRING MOTORS.

Specification forming part of Letters Patent No. 205.690, dated July 2,1878; application filed May 20, 1878.

To all whom it may concern.- 7

Be it known that I, ELISHA SHIVER, of Pittsburg, in the county ofAllegheny and State ofPennsylvania, have invented anew and usefulImprovement in Spring Motors; and I do hereby declare the following tobe a full, clear, and exact description thereof, reference being had tothe accompanying drawing, forming a part of this specification, in whichFigure 1 is front elevation of my improved spring motor. Fig. 2 is avertical section through the line at m, Fig. 1. Fig. 3 is a verticalsection through the line 3 1 Fig. 1. Fig. 4 is a diagram, illustratingthe method of reversing the direction of revolution of the pulley-shaft;and Fig. 5 is aview of the wood pulley, the upper half being raised toshow its construction.

Like letters indicate like parts in each.

My invention relates to motors for operating sewing-machines,watclrmakers lathes, and other light machinery, wherein the motive poweris obtained from coiled elastic springs wound around a central shaft';and it consists in certain improvements in the winding mechanism,mechanism for reversing the motion of the apparatus, the brakeapparatus, and, finally, in other improvements hereinafter specificallyset forth.

To enable others skilled in the art to make and use my invention, I willdescribe its construction and mode of operation.

In the drawing referred to, A A A A represent the standards or verticalframe-work, which are held at suitable distances apart by thecrossbraces B B at the base and the cross-braces B at the top of themotor. At the base of the motor, extending entirely through the same, isthe spring-shaft (1, which is mounted in suitable hearings in thestandards. Between each of the standards A A and A A attached to hubs orarbors c on the shaft 0 and to the motor-frame, are the coiled springsfrom which the power is obtained.

In the space between each of the standards A A and A A, I have attachedtwo or more flexible springs, d d, at different points on the peripheryof the hub c on the spring-shaft, and to different parts of the frame,the springs being on the same vertical plane and coiled together, butworking entirely separate from or independent of each other. When soarranged one spring re-enforces any weak part of the other, but, beingperfectly free, does not bind, and renders the motion more even. Thespring 01 is attached at c to the hub, and at b to the cross-brace, andthe spring (1 at c to the hub, and at b to the crossbrace. The ends onlyof the coiled springs dd are shown in the drawing. ()n the spring-shaftG, between the standards A A is rigidly attached the large spur-wheel E,through which the power of the springs is communicated to the motor.

In the standards A A A working in suitable bearings, is thewinding-shaft F, provided with the pinion f. which engages the pinion gon the shaft G, said shaft beii: g mounted in suitable bearings in thestandards A A The teeth of the pinion f are sunk below its periphery,and the projecting collars hold the pinion g in gear therewith.

The shafts F and G are so constructed as to be capable of a common orsimultaneous motion endwise in their bearings, so that when it isdesired to connect the winding mechanism with the springs the shafts F Gare slid over until the pinion g meshes into the spur-wheel B. By theuse of the intermediate pinion 9 between thelwimlingpinion and thespur-wheel, I remove the point at which the power is applied fartherfrom the spring-shaft, and thus make the winding of the heavy springseasier; and as the pinions are both drawn out of gear with thespur-wheel, no power is lost in running the winding mechanism during theoperation of the machine. I

The shaft F extends outside of the motorcase, and is provided with thewindingwvheel f, the handle f being attached in a slot in the wheel, sothat it may be changed to give a short or 1011 throw in winding. TheshaftH is mounted in the standards AA and is provided with the pinion h,which meshes into the spur-wheel E and the ratchet-wheel h, both beingrigidly attached to the shaft. It is also provided with the spur-wheelI, which moves loosely on the shaft, but is caused to revolve in onedirection by the ratchet-wheel h, which engages with the pawls i on thespur-wheel. When the springs are being wound up by the winding mechanismabove described, the pawls on the wheelI slide over the ratchet-wheeland the wheel I remains stationary. As soon as the springs are wound up,the shafts F G, with their pinions, are drawn out of gear with thespur-wheel, and remain stationary until required again for win din g.

Above the wheel 1 is arranged the frame K, which is pivoted to thestandards A A A at It, so that it maybe swung in the motonframe. Thepulley-shaft L is journaled in the swinging frame, and carries thepinion l, which meshes into the spur-wheel I. The swinging frame hasalso the pinion 12, mounted thereon in suitable bearings, and meshinginto the pinion l, and in such position that by raising or swinging theframe K the pinion l will be freed from the spur-wheel I and the pinionp ei'igage therewith, and the power will be imparted from the spur-wheelthrough the pinion 1) to the pinion l, as shown in Fig. 2, thusreversing the direction of revolution of the pulley-shaft. lVhen thepinion leugages directly with the spur-wheel the pinion 1) performs noparticular function. The swinging frame may be secured in either desiredposition by a bolt passing through one of the standards.

The pulleyshaft L carries the friction-drum m, against which the rubberbar of the brake apparatus is pressed, and the fiy-wheel N, whichimparts an even and regular motion to the apparatus. Pivoted to theframe A at s is the rubber bar S, which passes under the shaft L andworks against the drum m, for regulating the speed of the motor. Therubber bar is faced with leather or other suitable material, againstwhich the friction-drum m rubs, and carries the weight .9 at its lowerend to free it from contact with the drum when not in use. It has also aspring-extension, 8 extending to the front of the motor, in the uppersurface of which are formed notches or ratchetteeth, in which the end ofthe pressure-lever catches. The rubber bar is pressed up against thedrum by the pressurelever U, which is pivoted to the cross-brace B ofthe motor-frame, and by means of the arm it engages in the notches orserrations of the spring-extension 8 The force with which the bar Spresses against the drum is regulated by the notch in which the levercatches. The rubber bar S has a treadle-bar, w, attached to it at theend of the spring-extension .9 by means of which the speed of themachine can be regulated by the foot of the operator. The spring T, forstopping and starting the motor, is attached to an arm, t, extendingfrom the standard A, and passes under the fly-wheel N, and is providedwith a suitable rubber, which presses against the periphery of theflywheel. It is thrown out of contact with the wheel by means of thetrip-arm V, pivoted on the cross-brace B and pressing against the freeend of the sprin hen the triparm is drawn down until it catches in thestop It" on the spring, as shown in dotted lines, it presses the springdown from the wheel and permits its revolution. The handles of thepressure-lever U and trip-arm V extend to the front of the motor, so asto be within sight and easy reach, thus bringing the mo tor underperfect control of the operator of the machine.

The shaft L also carries the wood pulley R, over which the beltingpasses to the drivingwheel of the machine to be operated. The woodpulley R is made double, the workingfaces or peripheries upon which thedrivingbelt works being of difierent diameters, so that the speed of themachine to which it is attached may be altered by changing the belt toanother part of the pulley. It is divided longitudinally into two partsor halves, 1' T and attached to the shaft by means of the screws N,which pass from one half into the other and clamp the pulley around theshaft. It may thus be clamped on the pulley-shaft at any desired point,so that the face of the pulley needed will come directly under thedriving-wheel of the machine to which it is attached, by simplyunscrewing the screws 1' adjusting the pulley in the proper place, andclamping it again on the shaft by tightening up the screws. It may alsobe removed altogether and clamped to another part of the pulley-shaft.If the diameter of the shaft varies, the periphery of the pulley isstill held in proper relative position thereto, and the pulley is notthrown out of center, as each half will be equally affected thereby.

The operation of my improved motor is as follows: To wind the motor, theshafts F G, with their pinions, are slid endwise in their bearings untilthe pinion g meshes into the spur-wheel E, and the springs are wound byturning the windingshaft. When the springs are wound up, the pinion g isdrawn out of gear with the wheel E and the winding mechanism remainsstationary, thus relieving the motor from any friction from the windingmechanism while runnin The motor is started by drawing down the trip-armV and freeing the fly-wheel N from the spring T, thus permitting itsrevolution. The power of the springs (Z d is imparted, through thespur-wheel E, pinion h, spurwheel I, pinions p and I, to the thepulley-shaft L, and from the pulley R to the sewing or other machine. Bypressing down the lever U, the rubber bar S, working against the drum m,will regulate the speed of the motor by its frictional contacttherewith. The pressure-lever U may be fixed to confine the motor to anydesired speed, and the speed further regulated by the treadle-bar w. Themotor may be instantly stopped by raising the trip-arm V and permittingthe spring T to press against the flywheel. The motor is thus kept inperfeet control by the spring-brake T, which has great frictionalcontact and is adapted to stop and start it, and the rubber bar S, whichhas less frictional contact and is adapted to regulate the speed.

When it is desired to run the motor in the opposite direction, theswinging frame K is drawn down until the pinion p is thrown out of gearwith the spur-wheel I and the pinion l on the pulley-shaft meshes intosaid spurwheel, as shown in the diagram, Fig. 4, when the power will becommunicated directly from the wheel I to the shaft L, and the directionof revolution reversed. The swinging frame K, pivoted in the case, thusmakes the same attachments operative in machines running in oppositedirections.

What I claim as my invention, and desire to secure by Letters Patent, is

1. The two pinions f g, mounted on suitable shafts, both having asimultaneous motion into and out of gear with the spur-Wheel E, suchmotion being imparted from the windin g-shaft, substantially as and forthe purposes set forth.

2. The swinging frame K, carrying the pulley-shaft L and two pinions,Z19, in combination with the spur-wheel I, whereby the same attachmentsmay be made operative in machines running in opposite directions,substantially as set forth.

3. The spring T, thrown into and out of contact with the fly-wheel N bythe trip-arm V for stopping and starting, in combination with the rubberbar S and pressure-lever U, for regulating the speed, substantianally asdescribed.

4. The druln'm on the shaft L, in combination with the rubber bar S,having a springextension provided with a series of notches orratchet-teeth, and the pressure-lever U, the lower end of which isadapted to engage in any desired one of the notches or ratchet-teeth,and thereby regulate the speed, substantially as set forth.

5. The wood pulley R, having working-faces of different diameters, anddivided longitudinally into two halves, clamped upon the shaft by thescrews 4, passing from one half into the other, sustantially as and forthe purposes set forth.

In testimony whereof I, the said ELISHA SHIVER, have herento set myhand.

ELISHA SHIVER.

Witnesses: V

W. P. W001), JAMES I. KAY.

